<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      <ul>
        <li v-for="(item,index) in ary">
          {{item}}
          <button @click="del2(index)">删除</button>
        </li>
      </ul>
      <button @click="btn">生成</button>
    </div>
    <script src="./vue.js"></script>
    <script>
      const app = new Vue({
        el: "#app",
        data: {
          ary: [],
        },
        methods: {
          btn() {
            this.ary.push(Math.round(Math.random() * 20));
            console.log(this.ary);
          },
          del(e) {
            console.log(e.target.parentNode);
            let lli = e.target.parentNode;
            lli.parentNode.removeChild(lli);
          },
          del2(index){
            this.ary.splice(index,1)
          }
        },
      });
    </script>
  </body>
</html>
